The SIMATIC ET 200AL AQ 4xU/I is a compact 4-channel analog output module for decentralized field installation. Each channel is individually configurable for voltage or current output, with 16-bit resolution and a 1 ms update cycle across all channels. At just 30 mm wide with IP65/IP67 protection, it mounts directly on the machine — eliminating long analog cable runs from the control cabinet.

What output ranges are available and how are they configured?

Each of the 4 channels can be independently set via TIA Portal to one of six output ranges: voltage (±10 V, 0–10 V, 1–5 V) or current (0–20 mA, 4–20 mA, ±20 mA). The module supports substitute values on communication loss — each channel can hold its last value or switch to a user-defined safe state. Short-circuit and wire-break diagnostics are reported per channel via the PROFINET diagnostic alarm.

How does the ET 200AL analog output compare to a panel-mounted SM 332?

The ET 200AL AQ 4xU/I moves analog signal generation from the cabinet to the machine. Instead of a centralized SM 332 in an S7-300 rack with long shielded cables to each actuator, the AQ 4xU/I sits near the valves and drives — shorter wiring, less noise coupling, faster installation. The trade-off is channel density: 4 channels at 30 mm vs. 8 channels on a standard SM 332. Choose ET 200AL for distributed machine architectures; stick with panel I/O for high-density centralized control.

Frequently Asked Questions

What is the total current budget across all 4 channels?

The module can supply up to 1 A total when operating at or below 45 °C ambient. Above 45 °C, derate to 0.5 A total. Per-channel output current is limited by the load impedance — ≥1 kΩ for voltage output, ≤500 Ω for current output.

Can this module be used in safety-related applications?

No. The AQ 4xU/I is a standard analog output module without safety certification. For safety-related analog output applications, consult the ET 200SP F-AQ or other fail-safe analog modules in the Siemens portfolio.